To view this presentation, you'll need to enable Flash.

Show me how

After you enable Flash, refresh this webpage and the presentation should play.

Loading...

PPT – Circuit Theory 2 PowerPoint presentation | free to download - id: 25f5e-MTQ4O

The Adobe Flash plugin is needed to view this content

View by Category

Presentations

Products
Sold on our sister site CrystalGraphics.com

About This Presentation

Write a Comment

User Comments (0)

Transcript and Presenter's Notes

Circuit Theory 2

- Topics
- Impedance matching,
- Impedance transformation,
- Bandwidth and Noise.
- How you will use these topics
- Understanding the rangefinder circuits,
- Optimizing rangefinder performance,
- Understanding transducer models.

Impedance matching

- What is impedance matching?
- Any signal source has an associated source

impedance. - Any load circuit driven at a port exhibits an

associated impedance across the terminals of the

port. - Matching these impedances optimizes the transfer

of power from the source to the load.

- A source with a voltage divider

- A composite load circuit

Thevenins and Nortons Theorems

- Ideal sources
- An ideal voltage source has zero source

impedance. - An ideal current source has zero source

admittance. - Thevenins theorem any electrical signal source

is equivalent to an ideal voltage source in

series with a source impedance. - Nortons theorem any electrical signal source is

equivalent to an ideal current source in parallel

with a source admittance. - (Admittance is the complex reciprocal of

impedance)

Thevenin and Norton example

- Actual source
- Thevenin equivalent
- Norton equivalent

DC matching simple example and proof

- A battery with voltage Vg and internal resistance

Rg is connected to a load resistor Rl. - The power delivered to Rl is

- The maximum deliverable power occurs for

Impedance transformation

- Ideally is a lossless two-port circuit.
- Conservation of energy
- Reciprocal power can flow either way.
- Realizations
- Wideband transformer with n1, n2 turns,
- Resonant Pi network at resonance,

Magnetic transformers

- The magnetic field is

proportional to the total primary current linking

the magnetic path. - Magnetic induction is

the permeability of the magnetic path. - The voltage induced per turn is

, so the secondary voltage

, where . - Similarly, , so

. - Conservation of energy requires

, so - Impedance is transformed as

.

Pi net

(blue real, olive imaginary)

Bandwidth and Noise

- Note the Pi net bandwidth was about 3 kHz.
- The transformer was wideband.
- Why is bandwidth important?
- Response time is inversely proportional to

bandwidth. This limits the range resolution of

the rangefinder. - Noise is directly proportional to bandwidth.

This limits the maximum operational distance for

the rangefinder. - Therefore, a design tradeoff exists between range

resolution and maximum range.

Impedance matching homework problem

- Find the load impedance that accepts the

maximum deliverable power from a 5 V sinusoidal

source Vg at 40 kHz, having a source impedance

due to an internal series resistance of 50 Ohms

and inductance 500 uH. What components,

values, and topology will implement this load?

Sources homework problem

- Show the Thevenin and Norton equivalents of the

circuit shown.

- Extra credit
- Suppose you were given a sealed box 0.05m

x 0.05m x 0.02m, weighing 0.1kg with two

electrical terminals. It is totally opaque, even

to x-rays and ultrasound and cannot be

disassembled for inspection. When open

circuited, the voltage across the terminals is 1

V. When short circuited, the current between

the terminals is 1 A. You are told this is

either a Thevenin source or a Norton source. How

would you determine which? You may make any

measurements you like on the unit.

About PowerShow.com

PowerShow.com is a leading presentation/slideshow sharing website. Whether your application is business, how-to, education, medicine, school, church, sales, marketing, online training or just for fun, PowerShow.com is a great resource. And, best of all, most of its cool features are free and easy to use.

You can use PowerShow.com to find and download example online PowerPoint ppt presentations on just about any topic you can imagine so you can learn how to improve your own slides and presentations for free. Or use it to find and download high-quality how-to PowerPoint ppt presentations with illustrated or animated slides that will teach you how to do something new, also for free. Or use it to upload your own PowerPoint slides so you can share them with your teachers, class, students, bosses, employees, customers, potential investors or the world. Or use it to create really cool photo slideshows - with 2D and 3D transitions, animation, and your choice of music - that you can share with your Facebook friends or Google+ circles. That's all free as well!

For a small fee you can get the industry's best online privacy or publicly promote your presentations and slide shows with top rankings. But aside from that it's free. We'll even convert your presentations and slide shows into the universal Flash format with all their original multimedia glory, including animation, 2D and 3D transition effects, embedded music or other audio, or even video embedded in slides. All for free. Most of the presentations and slideshows on PowerShow.com are free to view, many are even free to download. (You can choose whether to allow people to download your original PowerPoint presentations and photo slideshows for a fee or free or not at all.) Check out PowerShow.com today - for FREE. There is truly something for everyone!

You can use PowerShow.com to find and download example online PowerPoint ppt presentations on just about any topic you can imagine so you can learn how to improve your own slides and presentations for free. Or use it to find and download high-quality how-to PowerPoint ppt presentations with illustrated or animated slides that will teach you how to do something new, also for free. Or use it to upload your own PowerPoint slides so you can share them with your teachers, class, students, bosses, employees, customers, potential investors or the world. Or use it to create really cool photo slideshows - with 2D and 3D transitions, animation, and your choice of music - that you can share with your Facebook friends or Google+ circles. That's all free as well!

For a small fee you can get the industry's best online privacy or publicly promote your presentations and slide shows with top rankings. But aside from that it's free. We'll even convert your presentations and slide shows into the universal Flash format with all their original multimedia glory, including animation, 2D and 3D transition effects, embedded music or other audio, or even video embedded in slides. All for free. Most of the presentations and slideshows on PowerShow.com are free to view, many are even free to download. (You can choose whether to allow people to download your original PowerPoint presentations and photo slideshows for a fee or free or not at all.) Check out PowerShow.com today - for FREE. There is truly something for everyone!

presentations for free. Or use it to find and download high-quality how-to PowerPoint ppt presentations with illustrated or animated slides that will teach you how to do something new, also for free. Or use it to upload your own PowerPoint slides so you can share them with your teachers, class, students, bosses, employees, customers, potential investors or the world. Or use it to create really cool photo slideshows - with 2D and 3D transitions, animation, and your choice of music - that you can share with your Facebook friends or Google+ circles. That's all free as well!

For a small fee you can get the industry's best online privacy or publicly promote your presentations and slide shows with top rankings. But aside from that it's free. We'll even convert your presentations and slide shows into the universal Flash format with all their original multimedia glory, including animation, 2D and 3D transition effects, embedded music or other audio, or even video embedded in slides. All for free. Most of the presentations and slideshows on PowerShow.com are free to view, many are even free to download. (You can choose whether to allow people to download your original PowerPoint presentations and photo slideshows for a fee or free or not at all.) Check out PowerShow.com today - for FREE. There is truly something for everyone!

For a small fee you can get the industry's best online privacy or publicly promote your presentations and slide shows with top rankings. But aside from that it's free. We'll even convert your presentations and slide shows into the universal Flash format with all their original multimedia glory, including animation, 2D and 3D transition effects, embedded music or other audio, or even video embedded in slides. All for free. Most of the presentations and slideshows on PowerShow.com are free to view, many are even free to download. (You can choose whether to allow people to download your original PowerPoint presentations and photo slideshows for a fee or free or not at all.) Check out PowerShow.com today - for FREE. There is truly something for everyone!

Recommended

«

/ »

Page of

«

/ »

Promoted Presentations

Related Presentations

Page of

Home About Us Terms and Conditions Privacy Policy Presentation Removal Request Contact Us Send Us Feedback

Copyright 2018 CrystalGraphics, Inc. — All rights Reserved. PowerShow.com is a trademark of CrystalGraphics, Inc.

Copyright 2018 CrystalGraphics, Inc. — All rights Reserved. PowerShow.com is a trademark of CrystalGraphics, Inc.

The PowerPoint PPT presentation: "Circuit Theory 2" is the property of its rightful owner.

Do you have PowerPoint slides to share? If so, share your PPT presentation slides online with PowerShow.com. It's FREE!